Aquarium tank



FIG. 1 is a front elevational view of an aquarium tank showing my new design, the rear being essentially the same as the front shown;

FIG. 2 is a top plan view thereof and;

FIG. 3 is a right side elevational view thereof, the left side being a mirror image of the right side shown. 

The ornamental design for an aquarium tank, substantially as shown and described. 